JP2011528730A5 - - Google Patents

Claims (15)

  A copolymer of an unsaturated acidic reactant and a high molecular weight polyolefin, wherein the polyolefin is an allyl-terminated polymerization product. (I) an allyl-terminated polymerization product
(A) ionizing the polyolefin to produce a carbocation terminated polyolefin;
(B) produced by reacting the carbocation terminated polyolefin of step (a) with an allylsilane compound in the presence of a Lewis acid, and (c) terminating step (b) to produce an allyl terminated polymer product. An allyl-terminated polymerization product; or
(Ii) the allyl-terminated polymerization product is
(A) producing a quasi-living tertiary halogenated terminal polyolefin in the presence of a Lewis acid and under suitable quasi-living conditions;
(B) an allyl-terminated quasi-living produced by reacting the quasi-living tertiary halogenated terminal polyolefin with an allylsilane compound, and (c) terminating step (b) to produce an allyl-terminated quasi-living polymerization product. The copolymer of claim 1 which is a polymerization product.   The copolymer of claim 2 wherein the allylsilane compound comprises allyltrimethylsilane or the free radical initiator comprises a peroxide. The copolymer according to any one of claims 1 to 3, wherein the copolymer is produced by contacting the polyolefin with an unsaturated acidic reactant in the presence of a free radical initiator. (I) whether the polyolefin has a number average molecular weight of 500 to 10,000, or 900 to 5,000;
(Ii) the copolymer has a succinic acid ratio of 1 to 2, or 1.0 to 1.5;
(Iii) a polyolefin of at least 75%, or either with a content of at least 90% of the allyl end groups; 1 to claim is or having or (iv) dispersion index of the polyolefin is less than 2, or less than 1.4 5. The copolymer according to any one of 4 . The copolymer according to any one of claims 1 to 5, wherein the polyolefin is polyisobutylene or the unsaturated acidic reactant comprises the following formula or maleic anhydride:

In the formula, X and X ′ are each independently selected from the group consisting of —OH, —Cl, and —O-lower alkyl, or X and X ′ together become —O—. The copolymer according to any one of claims 1 to 6, wherein the copolymer has the following formula:

Wherein _{three of} R ₁ , R ₂ , R ₃ , and R ₄ are hydrogen atoms, the other is a high molecular weight polyalkyl; x, y, and n are each independently one or more The ratio of x: y is 2: 1 to 1: 1.   The copolymer of claim 7, wherein n is 1 to 20, or the high molecular weight polyalkyl comprises a polyisobutyl group having at least 30 carbon atoms. A polysuccinimide produced by reacting the copolymer according to any one of claims 1 to 8 with an amine, a polyamine having at least two basic nitrogen atoms, or a mixture thereof.   A lubricating oil composition comprising a major amount of an oil having a lubricating viscosity and a minor amount of the polysuccinimide of claim 9. A method for producing a copolymer comprising:
(A) producing a high molecular weight allyl-terminated polyolefin; and (b) contacting the allyl-terminated polyolefin with an unsaturated acidic reactant in the presence of a free radical initiator to produce a copolymer. 12. The method of claim 11, wherein the allyl terminated polyolefin is produced by the following steps:
(A) ionizing the polyolefin to produce a carbocation terminated polyolefin;
(B) reacting the carbocation terminated polyolefin of step (a) with an allylsilane compound in the presence of a Lewis acid, and (c) terminating step (b) to form an allyl terminated polyolefin.   13. The method of claim 12, wherein the allylsilane compound comprises allyltrimethylsilane or the free radical initiator comprises a peroxide. 14. (i) The polyolefin has a number average molecular weight of 500 to 10,000, or 900 to 5000; or (ii) the polyolefin has an allyl end group content of at least 75%, or at least 90%. The method according to any one of the above . The method according to any one of claims 11 to 14 5,112,507 comprises at which whether or maleic anhydride of the formula::

In the formula, X and X ′ are each independently selected from the group consisting of —OH, —Cl, and —O-lower alkyl, or X and X ′ together become —O—.